Pitcairn Island's flag is a Blue Ensign with the island's Coat of Arms in the centre. The design was suggested by the Pitcairn Island Council in December 1980 and approved by HM The Queen in April 1984. The flag was flown on Pitcairn for the first time in May 1984, during a visit by the Governor the late Sir Richard Stratton. The flag measures 6' x 3'.
The description of Pitcairn's Coat of Arms, which was granted by Royal Warrant dated 4th November 1969: Azure on a Pile in base Vert fimbriated Or a representation of the Bounty Bible proper and in base of the Anchor of H.M.S. Bounty Or. And for the Crest on a Wreath Or and Vert on a Mount Vert a representation of the Pitcairn Island Wheelbarrow in front of a Slip of Miro leaved and fructed proper.
Information received by letter of 2 August 1996 from the Office of the Governor of Pitcairn, Henderson, Ducie and Oeno Island in Auckland, New Zealand.Jos Poels, 7 August 1996

The flag of Pitcairn is pictured in the book "The Flags" by Eric Inglefield in the 1970s. He reported that the flag was hoisted in 1970, when the islands became a separate territory. Was it an unofficial flag between 1970 and 1984?.
Jaume Ollé, 10 August 1996

I think Eric Inglefield was wrong. I possess a letter from the Public Relations Officer of Pitcairn - Irma Christian (yes-yes, a descendant of THE Christian!) - of 11 March 1981, where he states: "I regret to inform you that we have not a flag of our own. It was once planned to have our own designed flag but at the time the cost seemed so expensive that nothing further was done."
Jos Poels, 12 August 1997

Why is the ring
of the anchor not at the top of the shank, and what does the white rectangle
above the anchor represent?David Prothero, 25 May 2007

I drew the anchor from Graham Bartram's illustration which also lines up
with the Pitcairn Islands ensign I have in my collection. In both cases, the
ring is to the side.Clay Moss, 26 May 2007

The British High Commissioner to New Zealand is Governor of Pitcairn. I guess
that he must go there once in a while, and has a flag for the occasion. He is
probably entitled to fly the flag of Governor of the Pitcairn Islands only when
he is within the political limits of the islands.David Prothero, 15 July 2002

The Commonwealth Flag
Project & Commonwealth Disaster Relief Scheme in the UK holds the only
collection of Vice-Regal flags of the Queens Representatives in the world,
including that of the Governor of Pitcairn. With the generous help of the
Governor Vicki Tredell CMG CVO and Ginny Silva - Deputy Governor and Territorial
authorising Officer. We have just recently taken possession of what must be the
only one. Johnnie Amos, 20 January 2012